Isokinetic torque peak and hamstrings/quadriceps ratios in endurance athletes with anterior cruciate ligament laxity

Authors

  • Eliane Magaieski Portes Centro Universitário Adventista de São Paulo; Exercise physiology Laboratory
  • Leslie Andrews Portes Centro Universitário Adventista de São Paulo; Exercise physiology Laboratory
  • Viviane Gomes Botelho Centro Universitário Adventista de São Paulo; Exercise physiology Laboratory
  • Sérgio de Souza Pinto Centro Universitário Adventista de São Paulo; Exercise physiology Laboratory

DOI:

https://doi.org/10.1590/S1807-59322007000200006

Keywords:

Isokinetic torque, Knee, Anterior cruciate ligament, Laxity, Athletes

Abstract

PURPOSE: To evaluate torque and the hamstring/quadriceps ratio of the knee of athletes with and without anterior cruciate ligament laxity. METHODS: Twenty-eight male athletes, 19 without anterior cruciate ligament laxity and 9 with anterior cruciate ligament laxity, were evaluated with an isokinetic machine model Cybex 770. The peak torque of quadriceps and hamstrings was compared, and the hamstring/quadriceps ratio on the constant angular speed of 60º per second were also compared. RESULTS: In athletes with anterior cruciate ligament laxity, the peak torque values (right and left knees) of flexors (120 ± 15 and 116 ± 15 Nm) and of extensors (218 ± 36 Nm and 207 ± 26 Nm) were not different than those of athletes without laxity (109 ± 21 Nm and 111 ± 22 Nm; 191 ± 5 Nm and 188 ± 35 Nm). The hamstring/quadriceps ratio of athletes with laxity (right: 57 ± 6% and left: 56 ± 8%) did not differ from those without anterior cruciate ligament laxity (right: 58 ± 9% and left: 58 ± 7%). CONCLUSIONS: The anterior cruciate ligament laxity of long distances running athletes did not significantly alter the peak torque of flexors and of extensors or the hamstring/quadriceps ratio.

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Published

2007-01-01

Issue

Section

Clinical Sciences

How to Cite

Portes, E. M., Portes, L. A., Botelho, V. G., & Souza Pinto, S. de. (2007). Isokinetic torque peak and hamstrings/quadriceps ratios in endurance athletes with anterior cruciate ligament laxity . Clinics, 62(2), 127-132. https://doi.org/10.1590/S1807-59322007000200006